/*字体样式*/
.my_font{
    font-style: italic;
    font-weight: bolder;
    font-size: 2.75em;
    font-family: 华文琥珀，serif;
    line-height: 5rem;/*5px*16*80px*/
   /* line-height: 5rem;*/   /* 5*font-size(2.75em)=5*2.75*16px=220px */
    font-variant: all-small-caps;
}
/*文本样式*/
.my_text{
    border: 1px solid black;
    width: 30rem;
    height: 10rem;
    letter-spacing: 1rem;
    line-height: 2rem;
    text-indent: 1rem;
    text-align: center;
    vertical-align: middle;
}
/*颜色样式*/
.my_color{
    border: 1px solid black;
    width: 30em;
    height: 10em;
    color: blue;
}
/*背景样式*/
.my_bg{
    border: 1px solid black;
    width: 50em;
    height: 40em;
    background: greenyellow url("http://scimg.jb51.net/allimg/170908/106-1FZQ11I0412.jpg") no-repeat center center;
}
/*列表样式*/
.my_list{
    list-style-type: circle;
    list-style-image: url("http://www.jju.edu.cn/images/ico1.gif");
}
/*盒子模型*/
.my_box{
    width: 50rem;
    height: 20rem;
    border: 1px solid black;
    margin: 1rem 1rem 1rem 1rem;
    padding:1rem;
}